For dual-Y machines, if you do not need gantry auto-squaring during homing,
you can use the controller’s default lower-controller firmware,
then connect the pulse/direction signals of the two Y-axis drivers in parallel to the controller’s Y-axis terminals,
in addition, we also provide two extra firmware versions,
one with gantry auto-squaring disabled: https://www.bolangsk.cn/bolang/gujian_V1/xiaweiji/dual_y_no_auto_squaring.uf2
one with gantry auto-squaring enabled: https://www.bolangsk.cn/bolang/gujian_V1/xiaweiji/dual_y_with_auto_squaring.uf2
for the two firmware versions above, Y2 is used for the original B-axis pulse/direction and limit signal input,
if you use the firmware with gantry auto-squaring disabled, the Y2 limit switch does not need to be connected,
for the firmware above, please refer to System Update Guide -> Update Lower-Controller Firmware, and use a local file to update the firmware,
https://www.bolangsk.cn/docs/update-system-program/
if you need to restore the factory default firmware, simply click Online Update,